Affectionate bites of another person's shoulder (usually significant other) that can be measured in either number of nibbles or duration. Is often used as a mild 'punishment' as it can be quite ticklish/uncomfortable for the nibble receiver, and if nibbles are done through clothing it can create soggy patches of saliva.

Cute-sy pronunciation of the word 'nibbles'.

B: Sorry honey, I forgot to pick up the milk today!
S: What! I reminded you so many times. Fine, but you owe me 5 neebles (or 30 seconds of neebles)!
B: Sigh, fine. *Lifts up sleeve to expose shoulder*